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Finding the Fourth Proportional to 127,996.80, 176,470.56 and 87,641.04

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Solution

The fourth proportional to 127,996.80, 176,470.56 and 87,641.04 is: 120,831.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,996.80 : 176,470.56 = 87,641.04 : x
  2. Step 2: Convert to fraction form
    127,996.80/176,470.56 = 87,641.04/x
  3. Step 3: Cross multiply
    127,996.80x = 176,470.56 × 87,641.04
  4. Step 4: Simplify right side
    127,996.80x = 15,466,063,407.78
  5. Step 5: Solve for x
    x = 15,466,063,407.78/127,996.80
  6. Step 6: Final answer
    x = 120,831.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.